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FairEmail/FAQ.md

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FairEmail support

If you have a question, please check the frequently asked questions below first. At the bottom you can find how to ask other questions, request features and report bugs.

Authorizing accounts

For support on authorizing an account you should consult the documentation of your provider. Searching for IMAP and the name of the provider is mostly sufficient to find the right documentation. To setup an account (to receive email) and an identity (to send email) you need the IMAP and SMTP server addresses and port numbers, whether STARTTLS should be used and your username (mostly, but not always, your email address) and your password. In some cases you'll need to enable external access to your account and/or to use a special (app) password, for instance when two factor authentication is enabled.

For authorizing:

Known problems

  • A bug in Android lets FairEmail occasionally crash on long pressing or swiping.
  • A bug in Android "Bad notification posted ..." lets FairEmail crash on some devices after updating FairEmail and tapping on a notification.
  • A bug in Android 6 causes apps to sometimes show a wrong time format.
  • A bug in Android "ActivityRecord not found for ..." sometimes causes a crash after updating FairEmail.

Planned features

  • Synchronize on demand (manual)
  • Semi-automatic encryption
  • Copy message

Anything on this list is in random order and might be added in the near future.

Frequently requested features

  • Rich text editor / Markdown support: besides that very few people would use this on a small mobile device, Android doesn't support a rich text editor and most rich text editor open source projects are abandoned. See here for some more details.
  • Widget to read messages: widgets can have limited user interaction only, so a widget to read e-mail would not be very useful. Moreover, it would be not very useful to duplicate functions which are already available in the app.
  • Design: the design is based on many discussions and if you like you can discuss about it in this forum too.
  • ActiveSync: using the Exchange ActiveSync protocol requires a license, so this cannot be added. Moreover, the ActiveSync protocol is being phased out.

Since FairEmail is meant to be privacy friendly, the following will not be added:

  • Open links without confirmation
  • Show original messages from unknown senders without confirmation
  • Direct file/folder access: for security/privacy reasons (other) apps should use the Storage Access Framework, see also this FAQ and this FAQ

Confirmation is just one tap, which is just a small price for better privacy. Note that your contacts could unknowingly send malicious messages if they got infected with malware.

Stripped and reformatted messages are often better readable than original messages because the margins are removed and font sizes are standardized.

FairEmail does not allow other apps access to your messages and attachments without your approval.

FairEmail follows all the best practices for an email client as decribed in this EFF article.

Frequently Asked Questions

I have another question.

(1) Which permissions are needed and why?

  • have full network access (INTERNET): to send and receive email
  • view network connections (ACCESS_NETWORK_STATE): to monitor internet connectivity changes
  • run at startup (RECEIVE_BOOT_COMPLETED): to start monitoring on device start
  • in-app billing (BILLING): to allow in-app purchases
  • foreground service (FOREGROUND_SERVICE): to run a foreground service on Android 9 Pie and later, see also the next question
  • prevent device from sleeping (WAKE_LOCK): to keep the device awake while synchronizing messages
  • Optional: read your contacts (READ_CONTACTS): to autocomplete addresses and to show photos
  • Optional: find accounts on the device (GET_ACCOUNTS): to use OAuth instead of passwords
  • Optional: read the contents of your SD card (READ_EXTERNAL_STORAGE): to accept files from other, outdated apps, see also this FAQ
  • Android 5.1 Lollipop and before: use accounts on the device (USE_CREDENTIALS): needed to select accounts (not used/needed on later Android versions)

FairEmail will keep a list of addresses you receive messages from and send messages to and will use this list for contact suggestions when no contacts permissions is granted to FairEmail. This means you can use FairEmail without the Android contacts provider (address book). Note that you can still pick contacts without granting contacts permissions to FairEmail, only suggesting contacts won't work without contacts permissions.


(2) Why is there a permanent notification shown?

A permanent status bar notification with the number of accounts being synchronized, the number of messages to send and the number of operations pending (see next question) is shown to prevent Android from killing the service that takes care of receiving and sending email.

Most, if not all, other email apps don't show a notification with the "side effect" that new messages are often not or late being reported and that messages are not or late being sent.

Background: this is necessary because of the introduction of doze mode in Android 6 Marshmallow.

If you came here by clicking on the notification, you should known that the next click will open the unified inbox.


(3) What are operations and why are they pending?

The low priority status bar notification shows the number of pending operations, which can be:

  • add: add message to remote folder
  • move: move message to another remote folder
  • copy: copy message to another remote folder
  • delete: delete message from remote folder
  • send: send message
  • seen: mark message as read/unread in remote folder
  • answered: mark message as answered in remote folder
  • flag: add/remove star in remote folder
  • keyword: add/remove IMAP flag in remote folder
  • headers: download message headers
  • raw: download raw message
  • body: download message text
  • attachment: download attachment
  • sync: synchronize local and remote messages

Operations are processed only when there is a connection to the email server or when manually synchronizing. See also this FAQ.


(4) How can I use an invalid security certificate / IMAP STARTTLS / an empty password?

Invalid security certificate: you should try to fix this by contacting your provider or by getting a valid security certificate because invalid security certificates are insecure and allow man-in-the-middle attacks. If money is an obstacle, you can get free security certificates from Let’s Encrypt.

IMAP STARTTLS: the EFF writes: "Additionally, even if you configure STARTTLS perfectly and use a valid certificate, there’s still no guarantee your communication will be encrypted."

Empty password: your username is likely easily guessed, so this is very insecure.

If you still want to use an invalid security certificate, IMAP STARTTLS or an empty password, you'll need to enable insecure connections in the account and/or identity settings.


(5) How can I customize the message view?

In the three dot overflow menu you can enable or disable or select:

  • text size: for three different font sizes
  • compact view: for more condensed message items and a smaller message text font

In the display section of the advanced options you can enable or disable:

  • Unified inbox: to disable the unified inbox and to list the folders selected for the unified inbox instead
  • Group by date: show date header above messages with the same date
  • Conversation threading: to disable conversation threading and to show individual messages instead
  • Show contact photos: to hide contact photos
  • Show identicons: to show generated contact avatars
  • Show names and email addresses: to show names or to show names and email addresses
  • Show subject italic: to show the message subject as normal text
  • Show stars: to hide stars (favorites)
  • Show message preview: to show two lines of the message text
  • Show address details by default: to collapse the addresses section by default
  • Use monospaced font for message text: to use a fixed width typeface for message texts
  • Conversation action bar: to disable the bottom navigation bar
  • Automatically show original message for known contacts: to automatically show original messages for contacts on your device, please read this FAQ
  • Automatically show images for known contacts: to automatically show images for contacts on your device, please read this FAQ

Note that messages can be previewed only when the message text was downloaded. Larger message texts are not downloaded by default on metered (generally mobile) networks. You can change this in the advanced options.

If the list of addresses is long, you can collapse the addresses section with the less icon at the top of the addresses section.

Some people ask:

  • to show the subject bold, but bold is already being used to highlight unread messages
  • to show the address or subject larger/smaller, but this would interfere with the text size option
  • to move the star to the left, but it is much easier to operate the star on the right side

Unfortunately, it is impossible to make everybody happy and adding lots of settings would not only be confusing, but also never be sufficient.


(6) How can I login to Gmail / G suite?

Preferably select Gmail as provider and select an account on your device.

If you want/need to use a username/password instead of selecting an account, you'll need to enable access for "less secure" apps, see here for Google's instructions or go directy to the setting. You can solve the error 535-5.7.8 Username and Password not accepted by enabling "less secure" apps.

To login to Gmail / G suite you'll sometimes need an app specific password, for example when two factor authentication is enabled. See here for instructions: https://support.google.com/accounts/answer/185833.

If this doesn't work, see here for more solutions: https://support.google.com/mail/accounts/answer/78754


(7) Why are messages in the outbox not moved to the sent folder?

Messages in the outbox are moved to the sent folder as soon as your provider adds the message to the sent folder. This requires a sent folder to be selected in the account settings and the sent folder to be set to synchronizing. If this doesn't happen, your provider might not keep track of sent messages or you might be using an SMTP server not related to the provider. In these cases you can enable the advanced identity setting Store sent messages to workaround this.


(8) Can I use a Microsoft Exchange account?

You can use a Microsoft Exchange account if it is accessible via IMAP. See here for more information: https://support.office.com/en-us/article/what-is-a-microsoft-exchange-account-47f000aa-c2bf-48ac-9bc2-83e5c6036793

Please see here about ActiveSync support.


(9) What are identities?

Identities represent email addresses you are sending from.

Some providers allow you to have multiple email aliases. You can configure these by setting the email address field to the alias address and setting the user name field to your main email address.


(10) What does 'UIDPLUS not supported' mean?

The error message UIDPLUS not supported means that your email provider does not provide the IMAP UIDPLUS extension. This IMAP extension is required to implement two way synchronization, which is not an optional feature. So, unless your provider can enable this extension, you cannot use FairEmail for this provider.


(11) Why is POP not supported?

Besides that any decent email provider supports IMAP these days, using POP will result in unnecessary extra battery usage and delayed new message notifications. Moreover, POP is unsuitable for two way synchronization and more often than not people read and write messages on different devices these days.

Basically, POP supports only downloading and deleting messages from the inbox. So, common operations like setting message attributes (read, starred, answered, etc), adding (backing up) and moving messages is not possible.

See also what Google writes about it.

For example Gmail can import messages from another POP account, which can be used as a workaround for when your provider doesn't support IMAP.


(12) How does encryption/decryption work?

First of all you need to install and configure OpenKeychain. To encrypt and send a message just check the menu Encrypt and the message will be encrypted on sending. Similarly, to decrypt a received message, just select the menu Decrypt in the expanded message view.

You can enable Encrypt by default in the identity settings.

Encryption is Autocrypt compatible. For security reasons received messages are not decrypted automatically.

The decrypted message text and decrypted attachments are stored. If you want to undo this, you can use the resync message 'more' menu.

Inline PGP in received messages is supported, but inline PGP in outgoing messages is not supported, see here about why not.

S/MIME is not supported because it is not used much and because key management is complex. There are also security concerns.

Note that signed only or encrypted only messages are not supported, see here about why not:

If you want, you can verify a signature by opening the signature.asc attachment.

Encryption/decryption is a pro feature.


(13) How does search on device/server work?

You can start searching for messages on sender, recipient, subject, keyword or message text by using the magnify glass in the action bar of a folder. First on device messages will be searched and after that the search will be executed on the server, except if the unified inbox is a collection of more than one folder. Searching local messages is case insensitive and on partial text. The message text of local messages will not be searched if the message text was not downloaded yet. Searching on the server might be case sensitive or case insensitive and might be on partial text or whole words, depending on the provider. Searching messages is a pro feature.


(14) How can I setup Outlook / Hotmail with 2FA?

To use Outlook or Hotmail with two factor authentication enabled, you need to create an app password. See here for the details.

Unfortunately, Outlook and Hotmail do not properly support OAuth for IMAP/SMTP connections, so there is no other way.

Technical background: MSAL is supported for business accounts only and OAuth requires embedding a client secret in the app.


(15) Why does the message text keep loading?

The message header and message body are fetched separately from the server. The message text of larger messages is not being pre-fetched on metered connections and need to be fetched on opening the message. The message text will keep loading if there is no connection to the account, see also the next question.

In the advanced settings you can set the maximum size for automatically downloading of messages on metered connections.

Mobile connections are almost always metered and some (paid) Wi-Fi hotspots are too.


(16) Why are messages not being synchronized?

Possible causes of messages not being synchronized (sent or received) are:

  • The account or folder(s) are not set to synchronize
  • The number of days to synchronize is set to low
  • There is no usable internet connection
  • The email server is temporarily not available
  • Android stopped the synchronization service

So, check your account and folder settings and check if the accounts/folders are connected (see the legend menu for the meaning of the icons).

On some devices, where there are lots of applications competing for memory, Android may stop the synchronization service as a last resort. Some Android versions, in particular of Huawei (see here for a fix) or Xiaomi (see here for a fix) stop apps and services too aggressively. See also this dedicated website.


(17) Why does manual synchronize not work?

If the Synchronize now menu is dimmed, there is no connection to the account.

See the previous question for more information.


(18) Why is the message preview not always shown?

The preview of the message text cannot be shown if the message body has not been downloaded yet. See also this FAQ.


(19) Why are the pro features so expensive?

The right question is "why are there so many taxes and fees?":

  • VAT: 25 % (depending on your country)
  • Google fee: 30 %
  • Income tax: 50 %

So, what is left for the developer is just a fraction of what you pay.

Note that only some convenience and advanced features need to be purchased which means that FairEmail is basically free to use.

Also note that most free apps will appear not to be sustainable in the end, whereas FairEmail is properly maintained and supported, and that free apps may have a catch, like sending privacy sensitive information to the internet.


(20) Can I get a refund?

If a purchased pro feature doesn't work as intended and this isn't caused by a problem in the free features and I cannot fix the problem in a timely manner, you can get a refund. In all other cases there is no refund possible. In no circumstances there is a refund possible for any problem related to the free features, since there wasn't paid anything for them and because they can be evaluated without any limitation. I take my responsibility as seller to deliver what has been promised and I expect that you take responsibility for informing yourself of what you are buying.

(21) How do I enable the notification light?

Before Android 8 Oreo: there is an advanced option in the setup for this.

Android 8 Oreo and later: see here about how to configure notification channels. You can use the button Manage notifications in the setup to directly go to the Android notification settings. Note that apps cannot change notification settings, including the notification light setting, on Android 8 Oreo and later anymore.


(22) What do 'Couldn't connect to host', 'Connection refused', 'Network unreachable', 'Software caused connection abort', 'Connection reset by peer' and 'Read timed out' mean?

The messages ... Couldn't connect to host ..., ... Connection refused ... or ... Network unreachable ... mean that FairEmail was not able to connect to the email server.

The message ... Software caused connection abort ... means that the email server or something between FairEmail and the email server actively terminated an existing connection. This can for example happen when connectivity was abruptly lost. A typical example is turning on flight mode.

The message ... Connection reset by peer ... means that the email server actively terminated an existing connection.

The message ... Read timed out ... means that the email server is not responding anymore or that the internet connction is bad.

Possible causes are:

  • A firewall or router is blocking connections to the server
  • The host name or port number is invalid
  • The are problems with the internet connection
  • The email server is refusing to accept connections
  • There are too many connections to the server, see also the next question

If you are using a VPN, the VPN provider might block the connection because it is too aggressively trying to prevent spam.

FairEmail will automatically try to connect again after a delay. This delay will be doubled after each failed attempt to prevent draining the battery and to prevent from being locked out permanently.


(23) Why do I get 'Too many simultaneous connections' ?

The message Too many simultaneous connections is sent by the email server when there are too many folder connections for the same email account at the same time.

Possible causes are:

  • There are multiple email clients connected to the same account
  • The same email client is connected multiple times to the same account
  • The previous connection was terminated abruptly for example by abruptly losing internet connectivity, for example when turning on flight mode

If only FairEmail is connecting to the email server, first try to wait half an hour to see if the problem resolves itself, else enable the folder setting 'Poll instead of synchronize' for some folders. The poll interval can be configured in the account settings.

The maximum number of simultaneous folder connections for Gmail is 15, so you can synchronize at most 15 folders simultaneously on all your devices at the same time. See here for details.


(24) What is browse messages on the server?

Browse messages on the server will fetch messages from the email server in real time when you reach the end of the list of synchronized messages, even when the folder is set to not synchronize. You can disable this feature in the advanced account settings.


(25) Why can't I select/open/save an image, attachment or a file?

If a menu item to select/open/save a file is disabled (dimmed) or not available, the storage access framework, a standard Android component, is probably not present, for example because your custom ROM does not include it or because it was removed. FairEmail does not request storage permissions, so this framework is required to select files and folders. No app, except maybe file managers, targeting Android 4.4 KitKat or later should ask for storage permissions because it would allow access to all files.


(26) Can I help to translate FairEmail in my own language?

Yes, you can translate the texts of FairEmail in your own language here. Registration is free.


(27) How can I differentiate external and embedded images?

External image:

External image

Embedded image:

Embedded image

Broken image:

Broken image

Note that downloading external images from a remote server can be used to record you did see a message, which you likely don't want if the message is spam or malicious.


(28) How can I manage status bar notifications?

In the setup you'll find a button Manage notifications to directly navigate to the Android notifications settings for FairEmail.

On Android 8.0 Oreo and later you can manage the properties of the individual notification channels, for example to set a specific notification sound or to show notifications on the lock screen.

FairEmail has the following notification channels:

  • Service: used for the foreground service notification, see also this FAQ
  • Notifications: used for new message notifications
  • Error: used for error notifications

See here for details on notification channels. In short: tap on the notification channel name to access the channel settings.

On Android before Android 8 Oreo you can set the notification sound in the advanced options.

See this FAQ if your device has a notification light.


(29) How can I get new message notifications for other folders?

Just long press a folder, select Edit properties, and enable either Show in unified inbox or Notify new messages (available on Android 7 Nougat and later only) and tap Save.


(30) How can I use the provided quick settings?

There are quick settings (settings tiles) available to:

  • globally enable/disable synchronization
  • show the number of new messages and marking them as seen (not read)

Quick settings require Android 7.0 Nougat or later. The usage of settings tiles is explained here.


(31) How can I use the provided shortcuts?

There are shortcuts available to:

  • compose a new message to a favorite contact
  • setup accounts, identities, etc

Shortcuts require Android 7.1 Nougat or later. The usage of shortcuts is explained here.


(32) How can I check if reading email is really safe?

You can use the Email Privacy Tester for this.


(33) Why are edited sender addresses not working?

Most providers accept validated addresses only when sending messages to prevent spam.

For example Google modifies the message headers like this:

From: Somebody <somebody@example.org>
X-Google-Original-From: Somebody <somebody+extra@example.org>

This means that the edited sender address was automatically replaced by a validated address before sending the message.

Note that this is independent of receiving messages.


(34) How are identities matched?

Identities are as expected matched by account. For incoming messages the to and cc address will be checked and for outgoing messages the from addresses will be checked. Archived messages will be considered as incoming messages, but additionally the from address will be checked.

The matched address will be shown as via in the addresses section.

Matched identities can be used to color code messages. The identity color takes precedence over the account color. Setting identity colors is a pro feature.


(35) Why should I be careful with viewing images, attachments and the original message?

Viewing remotely stored images (see also this FAQ) might not only tell the sender that you have seen the message, but will also leak your IP address.

Opening attachments or viewing an original message might execute scripts, that might not only cause privacy sensitive information to leak, but can also be a security risk.

Note that your contacts could unknowingly send malicious messages if they got infected with malware.


(36) How are settings files encrypted?

Short version: AES 256 bit

Long version:

  • The 256 bit key is generated with PBKDF2WithHmacSHA1 using a 128 bit secure random salt and 65536 iterations
  • The cipher is AES/CBC/PKCS5Padding

(37) How are passwords stored?

All supported Android versions encrypt all user data, so all data, including usernames, passwords, messages, etc, is stored encrypted.


(38) Can you help me restore my Play store purchase?

Google manages all purchases, so as developer I have no control over purchases. So, the only thing I can do, is give some advice:

  • Make sure you have an active, working internet connection
  • Make sure the Google Play store / Play services are not blocked in any way, for example by a firewall
  • Make sure you are logged in with the right Google account and that there is nothing wrong with your Google account
  • Open the Play store application and wait at least a minute to give it time to synchronize with the Google servers
  • Open FairEmail to check the purchase again

Note that:

  • Purchases are stored in the Google cloud and cannot get lost
  • There is no time limit on purchases, so they cannot expire
  • Google does not expose details (name, e-mail, etc) about buyers to developers
  • An application like FairEmail cannot select which Google account to use

If you cannot solve the problem with the purchase, you will have to contact Google about it.


(39) How can I reduce the battery usage of FairEmail?

First of all, update to the latest version.

It is inevitable that synchronizing messages will use battery power because it requires network access and accessing the messages database.

Reconnecting to an email server will use extra battery power, so an unstable internet connection will result in extra battery usage.

Recent Android versions by default report app usage as a percentage in the Android battery settings screen. Confusingly, app usage is not the same as battery usage. The app usage will be very high because FairEmail is using a foreground service which is considered as constant app usage by Android. However, this doesn't mean that FairEmail is constantly using battery power. The real battery usage can be seen by using the three dot overflow menu Show full device usage. As a rule of thumb the battery usage should be below or in any case not be much higher than Mobile network standby. If this isn't the case, please let me know.

Most of the battery usage, not considering viewing messages, is due to synchronization (receiving and sending) of messages. So, to reduce the battery usage, set the number of days to synchronize message for to a lower value, especially if there are a lot of recent messages in a folder. Long press a folder name in the folders list to access this setting.

If you have at least once a day internet connectivity, it is sufficient to synchronize messages just for one day.

Note that you can set the number of days to keep messages for to a higher number than to synchronize messages for. You could for example initially synchronize messages for a large number of days and after this has been completed reduce the number of days to synchronize messages for, but leave the number of days to keep messages for.

Starred messages will always be synchronized, which will allow you to keep older messages around while synchronizing messages for a limited number of days.

Disabling the folder option Automatically download message texts and attachments will result in less network traffic and thus less battery usage. You could disable this option for example for the sent folder and the archive.

If you got the message This provider does not support push messages while configuring an account, consider switching to a modern provider which supports push messages (IMAP IDLE) to reduce battery usage.

If your device has an AMOLED screen, you can save battery usage while viewing messages by switching to the black theme (this is a pro feature).


(40) How can I reduce the network usage of FairEmail?

You can reduce the network usage basically in the same way as reducing battery usage, see the previous question for suggestions.

Additionally, you can set FairEmail to download small messages and attachments on a metered (mobile, paid) connection only or let FairEmail connect via unmetered connections only. These advanced settings are accessible via Setup > Advanced options.


(41) How can I fix the error 'Handshake failed' ?

There are several possible causes, so please read to the end of this answer.

The error 'Handshake failed ... WRONG_VERSION_NUMBER' might mean that you are trying to connect to an IMAP or SMTP server without an encrypted connection, typically using port 143 (IMAP) and port 25 (SMTP).

Most providers provide encrypted connections using different ports, typically port 993 (IMAP) and port 465/587 (SMTP).

If your provider doesn't support encrypted connections, you should ask to make this possible. If this isn't an option, you could enable Allow insecure connections both in the advanced settings AND the account/identity settings.

See also this FAQ.

The error 'Handshake failed ... SSLV3_ALERT_ILLEGAL_PARAMETER' is either caused by a bug in the SSL protocol implementation or by a too short DH key on the email server and can unfortunately not be fixed by FairEmail.


(42) Can you add a new provider to the list of providers?

If the provider is used by more than a few people, yes, with pleasure.

The following information is needed:

<provider
	name="Gmail"
	link="https://support.google.com/mail/answer/7126229" // setup instructions
	type="com.google"> // this is not needed
	<imap
		host="imap.gmail.com"
		port="993"
		starttls="false" />
	<smtp
		host="smtp.gmail.com"
		port="465"
		starttls="false" />

The EFF writes: "Additionally, even if you configure STARTTLS perfectly and use a valid certificate, there’s still no guarantee your communication will be encrypted."

So, pure SSL connections are safer than using STARTTLS and therefore preferred.

Please make sure receiving and sending messages works properly before contacting me to add a provider.

See below about how to contact me.


(43) Can you show the original ... ?

Show original, shows the original message as the sender has sent it, including original margins, styling, etc. FairEmail does and will not alter this in any way.


(44) Can you show contact photos / identicons in the sent folder?

Contact photos and identicons are always shown for the sender because this is necessary for conversation threads. Getting contact photos for both the sender and receiver is not really an option because getting contact photo is an expensive operation.


(45) How can I fix 'This key is not available. To use it, you must import it as one of your own!' ?

You'll get the message This key is not available. To use it, you must import it as one of your own! when trying to decrypt a message with a public key. To fix this you'll need to import the private key.


(46) Why does the message list keep refreshing?

If you see a 'spinner' at the top of the message list, the folder is still being synchronized with the remote server. You can see the progress of the synchronization in the folder list. See the legend about what the icons and numbers mean.

The speed of your device and internet connection and the number of days to synchronize messages for determine how long synchronization will take. Note that you shouldn't set the number of days to synchronize messages for to more than one day in most cases, see also this FAQ.


(47) How can I solve 'No primary account or no drafts folder' ?

You'll get the error message No primary account or no drafts folder when trying to compose a message while there is no account set to be the primary account or when there is no drafts folder selected for the primary account. This can happen for example when you start FairEmail to compose a message from another app. FairEmail needs to know where to store the draft, so you'll need to select one account to be the primary account and/or you'll need to select a drafts folder for the primary account.

This can also happen when you try to reply to a message or to forward a message from an account with no drafts folder while there is no primary account or when the primary account does not have a drafts folder.


(48) How can I solve 'No primary account or no archive folder' ?

You'll get the error message No primary account or no archive folder when searching for messages from another app. FairEmail needs to know where to search, so you'll need to select one account to be the primary account and/or you'll need to select a archive folder for the primary account.


(49) How can I fix 'An outdated app sent a file path instead of a file stream' ?

You likely selected or sent an attachment or image with an outdated file manager or an outdated app which assumes all apps still have storage permissions. For security and privacy reasons modern apps like FairEmail have no full access to all files anymore. This can result into the error message An outdated app sent a file path instead of a file stream if a file name instead of a file stream is being shared with FairEmail because FairEmail cannot randomly open files. You can fix this by switching to an up-to-date file manager or an app designed for recent Android versions. Alternatively, you can grant FairEmail read access to the storage space on your device in the Android app settings.

See also question 25 and what Google writes about it.


(50) Can you add an option to synchronize all messages?

A synchronize all (download all) messages will not be added because it can easily result in out of memory errors and the available storage space filling up. It can also easily result in a lot of battery and data usage. Mobile devices are just not very suitable to download and store years of messages. You can better use the search on server function (see question 13), which is faster and more efficient. Note that searching through a lot of messages stored locally would only delay searching and use extra battery power.


(51) How are folders sorted?

Folders are sorted with special, system folders on top, followed by folders set to synchronize. Within each category the folders are sorted on name.

Some providers prefix some folders with INBOX, but these folders are in fact just user folders, so they are sorted below the special, system folders. It is not possible to make an exception for this because some other providers prefix all folders with INBOX.

Note that you can give folders a display name by long pressing on a folder name, which can be useful because the display name will be used for sorting.


(52) Why does it take some time to reconnect to an account?

There is no reliable way to know if an account connection was terminated gracefully or forcefully. Trying to reconnect to an account while the account connection was terminated forcefully too often can result in problems like too many simultaneous connections or even the account being blocked. To prevent such problems, FairEmail waits 90 seconds until trying to reconnect again.


(53) Can you stick the message action bar to the top/bottom?

The message action bar works on a message and the bottom action bar works on the conversation. Since there is often more than one message in a conversation, this is not possible.


(54) How do I use a namespace prefix?

A namespace prefix is used to automatically remove the prefix providers sometimes add to folder names.

For example the Gmail spam folder is called:

[Gmail]/Spam

By setting the namespace prefix to [Gmail] FairEmail will automatically remove [Gmail]/ from all folder names.


(55) How can I mark all messages as read / move or delete all messages?

You can use multiple select for this. Long press the first message, don't lift your finger and slide down to the last message. Then use the three dot action button to execute the desired action.


(56) Can you add support for JMAP?

There are almost no providers offering the JMAP protocol, so it is not worth to add support for this to FairEmail.


(57) Can I use HTML in signatures?

Yes, you can use HTML in signatures if you paste HTML formatted text into the signature field or use the Edit as HTML button.

See here for which HTML tags are supported.

You can for example past this into the signature field:

This is italic, this is bold and this is a link.


(58) What does an open/closed email icon mean?

The email icon in the folder list can be open (outlined) or closed (solid):

External image

Message bodies and attachments are not downloaded by default.

External image

Message bodies and attachments are downloaded by default.


(59) Can original messages be opened in the browser?

For security reasons the files with the original message texts are not accessible to other apps, so this is not possible. In theory the Storage Access Framework could be used to share these files, but even Google's Chrome cannot handle this.


(60) Did you know ... ?

  • Did you know that starred messages are always synchronized/kept?
  • Did you know that you can long press the 'write message' icon to go to the drafts folder?
  • Did you know that you can long press the account name in the navigation menu to go to the inbox of that account?
  • Did you know there is an advanced option to mark messages read when they are moved and that archiving and trashing is also moving?
  • Did you know that you can select text (or an email address) in any app on recent Android versions and let FairEmail search for it? You'll need to set a primary account and an archive folder for this to work, so FairEmail knows where to search. There will be 'FairEmail' in the menu with copy, cut, etc.
  • Did you know that FairEmail has a tablet mode? Rotate your device in landscape mode and conversation threads will be opened in a second column if there is enough screen space.
  • Did you know that you can long press a reply template to create a draft message from the template?
  • Did you know that you can long press, hold and swipe to select a range of messages?
  • Did you know that you can retry sending messages by using pull-down-to-refresh in the outbox?
  • Did you know that you can swipe a conversation left or right to go to the next or previous conversation?
  • Did you know that you can tap on an image to see where it will be downloaded from?
  • Did you know that you can long press the bell icon to delete the notification channel for the email address?

(61) Why are some messages shown dimmed?

Messages shown dimmed are locally moved messages for which the move is not confirmed by the server yet. This can happen when the folder is set to not synchronize, when there is no connection to the server or when the messages are too old to be synchronized. Eventually, these messages will be synchronized when the connection to the server is restored or will be deleted if they are too old to be synchronized.

You can view these messages, but you cannot move these messages again until the previous move has been confirmed by the server.

Some providers don't keep track of sent messages or you might be using an SMTP server not related to the provider. This will result in messages in the sent folder never to be synchronized. See this FAQ for more information on this.


(62) Which authentication methods are supported?

The following authentication methods are supported and used in this order:

  • LOGIN
  • PLAIN
  • NTLM (untested)
  • XOAUTH2 (used when an account was selected)

SASL authentication methods, like CRAM-MD5, are not supported because JavaMail for Android does not support SASL authentication. If using secure connections, a must today, there is little value in using CRAM-MD5 anyway.

If your provider requires an unsupported authentication method, you'll likely get the error message authentication failed.


(63) How are images resized for displaying on screens?

Large inline or attached PNG and JPEG images will automatically be resized for displaying on screens. This is because email messages are limited in size, depending on the provider mostly between 10 and 50 MB. Image will be resized to a maximum width and height of about 1280 pixels and saved with a compression ratio of 90 out of 100. Images are scaled down using whole number factors to reduce memory usage and to retain image quality. There is an advanced option to disable automatically resizing of image attachments.


(64) Can you add custom actions for swipe left/right?

The most natural thing to do when swiping a list entry left or right is to remove the entry from the list. The most natural action in the context of an email app is moving the message out of the folder to another folder. You can select the folder to move to in the account settings. Other actions, like marking messages read and snoozing messages are available via multiple selection. You can long press a message to start multiple selection.


(65) Why are some attachments shown dimmed?

Inline (image) attachments are shown dimmed. Inline attachments are supposed to be downloaded and shown automatically, but since FairEmail doesn't always download attachments automatically, see also this FAQ, FairEmail shows all attachment types. To distinguish inline and regular attachments, inline attachments are shown dimmed.


(66) Is FairEmail available in the Google Play Family Library?

There are too many fees and taxes, Google alone already takes 30 %, to justify making FairEmail available in the Google Play Family Library.


(67) How can I snooze conversations?

Multiple select one of more conversations (long press to start multiple selecting), tap the three dot button and select Snooze .... Alternatively, use the Snooze ... 'more' menu in the expanded message view. Select the time the conversation(s) should snooze and confirm by tapping OK. The conversations will be hidden for the selected time and shown again afterwards. You will receive a new message notification as reminder.

You can show snoozed messages by using the Snoozed item in the three dot overflow menu.

You can tap on the small snooze icon to see until when a conversation is snoozed.

By selecting a zero snooze duration you can cancel snoozing.


(68) Why can Adobe Acrobat reader not open PDF attachments / Microsoft apps not open attached documents?

Adobe Acrobat reader and Microsoft apps still expects full access to all stored files, while apps should use the Storage Access Framework since Android KitKat (2013) to have access to actively shared files only. This is for privacy and security reasons.

You can workaround this by saving the attachment and opening it from the Adobe Acrobat reader / Microsoft app, but you are advised to install an up-to-date and preferably open source PDF reader / document viewer, for example one listed here.


(69) Can you add auto scroll up on new message?

The message list is automatically scrolled up when navigating from a new message notification or after a manual refresh. Always automatically scrolling up on arrival of new messages would interfere with your own navigation and scrolling.


(70) When will messages be auto expanded?

When navigation to a conversation one message will be expanded if:

  • There is just one message in the conversation
  • There is exactly one unread message in the conversation

There is one exception: the message body text was not downloaded yet and the message body text is too large to download automatically on a metered connection.

Duplicate (archived) messages, trashed messages and draft messages are not counted.


(71) How do I use filter rules?

You can edit filter rules by long pressing a folder in the folder list. The rules will be applied to new messages received in the folder, not to existing messages.

You'll need to give a rule a name and you'll need to define the order in which a rule should be executed relative to other rules.

You can disable a rule and you can stop processing other rules after a rule has been executed.

All the conditions of a rule need to be true for a filter rule to be executed. Conditions are optional, but there needs to be at least one condition. Matching is not case sensitive, unless you use regular expressions.

You can select one of these actions to apply to matching messages:

  • Mark as read
  • Mark as unread
  • Move
  • Reply template

Filter rules are applied direct after the message header has been fetched, before the message text has been downloaded, so it is not possible to apply filter rules to the message text. Note that large message texts are downloaded on demand on a metered connection to save data.

To debug rules you can long press Operations to see logging about the evaluation of rule conditions. Since message headers are not downloaded and stored by default to save on battery and data usage and to save storage space it is not possible to preview which messages would match the rule conditions.

Using filter rules is a pro feature.


(72) What are primary accounts/identities?

The primary account is used when the account is ambiguous, for example when starting a new draft from the unified inbox.

Similarly, the primary identity of an account is used when the identity is ambiguous.

There can be just one primary account and there can be just one primary identity per account.


(73) Is moving messages across accounts safe/efficient?

Moving messages across accounts is safe because the raw, original messages will be downloaded and moved and because the source messages will be deleted only after the target messages have been added

Batch moving messages across accounts is efficient if both the source folder and target folder are set to synchronize, else FairEmail needs to connect to the folder(s) for each message.


(74) Why do I see duplicate messages?

Some providers, notably Gmail, list all messages in all folders, except trashed messages, in the archive (all messages) folder too. FairEmail shows all these messages, except for one, dimmed, to indicate that these messages are in fact the same message.

Gmail allows one message to have multiple labels, which are presented to FairEmail as folders. This means that messages with multiple labels will be shown multiple times as well.

Since there is not really an original message because it is in fact just the same message, it is not really possible to show just one message.


(75) Can you make an iOS, Windows, etc version?

I develop apps for Android only.


(76) What does 'Clear local messages' ?

The folder menu Clear local messages removes messages from the device which are present on the server too. It does not delete messages from the server. This can be useful after changing the folder settings to not download the message content (text and attachments), for example to save space.


(77) Why are messages sometimes shown with a small delay?

Depending on the speed of your device (processor speed and maybe even more memory speed) messages might be displayed with a small delay. FairEmail is designed to dynamically handle a large number of messages without running out of memory. This means that messages needs to be read from a database and that this database needs to be watched for changes, both of which might cause small delays.

Some convenience features, like grouping messages to display conversation threads and determining the previous/next message, take a little extra time. Note that there is no the next message because in the meantime a new message might have been arrived.

When comparing the speed of FairEmail with similar apps this should be part of the comparison. It is easy to write a similar, faster app which just displays a lineair list of messages while possible using too much memory, but it is not so easy to properly manage resource usage and to offer more advanced features like conversation threading.

FairEmail is based on the state-of-the-art Android architecture components, so there is little room for performance improvements.


(78) How do I use schedules?

In the advanced options you can enable scheduling and set the time to turn synchronizing automatically on and off.

An end time equal to or earlier than the start time is considered to be 24 hours later. ​ Turning FairEmail on or off, for example by using a quick settings tile, will not turn scheduling off. This means that the next schedule event will still turn FairEmail on or off.

You can also automate turning synchronization on and off by sending these commands to FairEmail:

(adb shell) am startservice -a eu.faircode.email.ENABLE
(adb shell) am startservice -a eu.faircode.email.DISABLE

Sending these commands will automatically turn scheduling off.

You can automatically send commands with for example Tasker:

New task: Something recognizable
Action Category: Misc/Send Intent
Action: eu.faircode.email.ENABLE
Target: Service

Automation can be used for more advanced schedules, like for example multiple synchronization periods per day or different synchronization periods for different days.

Scheduling is a pro feature.


(79) How do I use synchronize on demand (manual)?

Normally, FairEmail maintains a connection to the configured email servers whenever possible to receive messages in real-time. If you don't want this, for example to not be disturbed or to save on battery usage, just disable synchronization in the advanced options. This will stop the background service which takes care of automatic synchronization and will remove the associated status bar notification. You can use pull-down-to-refresh in a folder or use the folder menu Synchronize now to manually synchronize messages.


(80) How can I fix 'Unable to load BODYSTRUCTURE' ?

The error message Unable to load BODYSTRUCTURE is caused by bugs in the email server, see here for more details.

FairEmail already tries to workaround these bugs, but if this fail you'll need to ask for support from your provider.


(81) Can you make the background of the original message dark in the dark theme?

The original message is shown as the sender has sent it, including all colors. Changing the background color would not only make the original view not original anymore, it can also result in unreadable messages.


(82) What is a tracking image?

Please see here about what a tracking image exactly is. In short tracking images keep track if you opened a message.

FairEmail automatically recognizes images with a surface of less than or equal to 25 pixels as tracking images. FairEmail automatically removes the link of such images, which makes such images appear as broken, and adds a remark about this below the image.


(83) What does 'User is authenticated but not connected' mean?

This is likely a confusing Microsoft Exchange (Office365) message telling that the password is invalid.

Less likely is that you are synchronizing too many folders. This can also happen due to abruptly losing connectivity resulting in not properly closing connections.

So, double check the password or reduce the number of folders to synchronize.


(84) What are local contacts for?

The main use of the local contacts storage is to offer auto completion when no contacts permission is or can be granted to FairEmail.

Another use is to generate shortcuts on recent Android versions to quickly send a message to frequently contacted people. This is also why the number of times contacted and the last time contacted is recorded and why you can make a contact a favorite or exclude from favorites by long pressing it.

The list of contacts is sorted on number of times contacted and the last time contacted.


(85) Why is an identity not available?

An identity is available for sending a new message or replying or forwarding an existing message only if:

  • the identity is set to synchronize (send messages)
  • the associated account is set to synchronize (receive messages)
  • the associated account has a drafts folder

FairEmail will try to select the best identity based on the to address of the message replied to / being forwarded.


(86) What are 'extra privacy features'?

The advanced option extra privacy features enables:

  • Detection and removal of tracking images
  • Splitting linked images into an image and a link

(87) What does 'invalid credentials' mean?

The error message invalid credentials means either that the user name and/or password is incorrect, for example because the password was changed or expired, or that the account authorization has expired.

If the password is incorrect/expired, you will have to update the password in the account and/or identity settings.

If the account authorization has expired, you will have to select the account again. You will likely need to save the associated identity again as well.


Support

If you have another question, want to request a feature or report a bug, you can use this forum. Registration is free.

If you are a supporter of the project, you can get limited personal support by using this form.